- "I get that you miss your mom. But she's gone. Really gone. And there are plenty of people who are only kinda gone, and you can help them. So is it too much to ask that you brush the crumbs out of your beard, make sure you talk to pretty pants, and when she's not looking, suck out the Infinity Stone and help me get my family back?"
- ―Rocket Raccoon to Thor[src]
The Aether was created from the Reality Stone as a weapon by the leader of the Dark Elves, Malekith, who intended to use its powers to transform the universe into darkness during the Convergence. However, the Aether was later entrusted to the Collector after a series of altercations with the Asgardians which lasted thousands of years until it was retrieved by Thanos, who used it and the other Infinity Stones in conjunction to wipe out half of the universe's population.
Five years later, the Avengers, who had discovered that they could use the Quantum Realm and Tony Stark's Time-Space GPS to travel through time and space, hatched a Time Heist, in which they would travel to the past and amass the six Infinity Stones in order to undo the Snap. Thor and Rocket Raccoon were tasked with extracting the Reality Stone from Jane Foster on Asgard during her brief stay there in 2013.
Thor and Rocket Raccoon traveled back in time to 2013, arriving at Asgard to extract the Reality Stone from Jane Foster for the Avengers' plan to reverse the effects of the Snap. As Rocket scoped out the area, Thor started to have a panic attack and wandered off, leaving Rocket to proceed solo. Thor found himself talking to his mother Frigga while Rocket Raccoon successfully extracted the stone from Jane Foster. However, this caused high alert, and Rocket was chased by several guards until he ran into Thor again. As they went to return to the present, Thor quickly summoned Mjølnir, revealing he was still worthy.
The Aether was solidified into the Reality Stone and placed within the Nano Gauntlet, created by Tony Stark, Hulk, and Rocket Raccoon. Following the Battle of Earth, the Reality Stone was placed in a suitcase and given to Steve Rogers, who traveled back in time to 2013 in order to return the stone to Asgard, albeit in its solid form.
Behind the Scenes
- In the first draft for the script of Avengers: Endgame, Tony Stark traveled to Asgard with Thor, searching for both the Reality Stone and the Tesseract in Odin's Vault. Using a stealth suit to not be detected by the Asgardians, he was meant to have a fight with Heimdall, who could have localized him with his enhanced senses.
- Although not seen in the film, the script also detailed a scene in which the Royal Palace of Valaskjalf begins to crumble as the Dark Elves initiate their attack on Asgard in their search for the Aether, which prompts Frigga to reach for her sword. This occurs right after Thor and Rocket Raccoon return to the present with the contained Reality Stone.